# C massecuite final purity calculation |Grain Quantity requirement for C CVP

## Calculation for C massecuite dropping purity | Online Calculator

Here two types of examples given for C massecuite dropping purity calculation. One is for grain and massecuite prepared in batch pan and example  another is grain prepared in batch pan and massecuite prepared in continuous vacuum pan(CVP). Online calculation sheet also provided.

Example No.1 :

Grain prepared in 60T batch pan after that 50% material cut to vacuum crystalizer then further filled and dropped as a C m/c.

Calculate C massecuite dropping purity ( Take C grain with AH + BH + CL in 60T batch pan, After it is cutting 50% to vacuum crystalizer then further use only BH molasses upto dropping the massecuite).

Step 1 :

First fixed the required footing material purity for grain ( Before adding the slurry) suppose to be take 64

Here using AH + CL using as graining material ( AH purity – 70 with 75 brix and CL purity 62 with 75 brix)

Pan Capacity = 60MT.

Graining Volume of given batch pan = 45%.

Pan working volume = 60/1.5 = 40M3 = 400HL.

Graining Volume = 40 x 45 / 100 = 18M3 = 180HL. ( here consider graining volume of batch pan 45%)

Weight of the graining material  = Volume x specific gravity = 18 x 1.42 = 25.56MT.

Solids in graining material = 25.56 x Brix(92) /100 = 23.51MT.

 AH 72 2 (64-62) Graining Material 64 CL 62 8 (72-64) 10 (8 + 2)

Solids from AH for C grain = (2 /10) x 23.51 = 4.70MT.

Solids from CL for grain material = 23.31 – 4.70 = 18.81MT.

 Material Solids Purity Brix Weight in MT ( Solids x 100/Brix) Volume in M3       ( Weight/ Sp. Volume) Volume in HL AH 4.7 72 75 6.267 4.61 46 CL 18.81 62 75 25.08 18.44 184

Step 2 :

After handing the the grain further fill up with BH molasses ( Brix 75 & purity 51 ).

Solids in C grain at the time of dropping = 60MT x 92 /100 = 55.20MT.

Solids from BH molasses for further filling of C grain =55.20 – 23.51 = 31.69MT

Weight of the BH molasses = 31.69 x100/ 75 = 42.25MT

Volume of the BH molasses = 42.25 /1.36 = 31.06 M3 = 310HL.

Final C Grain Purity = [ (Solids in grain x Pty of grain) + ( solids in BH x Pty of BH) ] / solids in final Cgrain.

= [ (23.51 x 64) + (31.69 x 51)] / 55.20

=56.53.

Step 3 :

Now 50% material transfer to vacuum crytsallizer and then filled with BH molasses ( Brix 75 & purity 51 ) and dropped as a C massecuite. Consider C m/c  dropping brix 99.5.

Solids in C grain after 50% transfer to vacuum crystalizer = 55.20/2 = 27.60.

Solids in C massecuite = 60MT x 99.5 /100 = 59.7.

Solids in BH for C massecuite boiling = 59.70 – 27.60 = 32.10.

Weight of the BH molasses for C m/c = 32.10 x100/ 75 = 42.80MT

Volume of the BH molasses for C m/c  = 42.80 /1.36 = 31.47 M3 = 315HL.

Final C massecuite dropping purity = [ (Solids in grain x Pty of grain) + ( solids in BH x Pty of BH) ] / solids in C m/c

= [ (27.60 x 56.53) + (32.10 x 51)] / 59.7 = 53.56.

Example No.2 :

Grain prepared in 60T batch pan then it send to continuous pan with  1 : 3 Grain & molasses ratio.

Required Data for calculation of C grain purity,  C masseuite final purity, quantity of grain and molasses requirement for continuous pan. Finally estimate the vapour requirement for C continuous pan for the given pan capacity.

 Particulars Brix purity Sp. Gr. AH molasses 75 72 1.337 BH molasses 80 53 1.401 CL 75 63 1.337 C grain footing ( Before slurry feed) 86 67 1.435 C grain 88 ? 1.435 C grain batch pan capacity 60 T Grain Volume of the batch pan 45 % Grain &  molasses ratio 1 : 3 C continuous pan capacity 20 T/hr C massecuite Brix 100

Step 1 :

First fixed the required footing material purity for grain ( Before adding the slurry) and then find the C grain dropping purity.

 CL 7 (72- 65) 63 Footing material for Grain 65 AH 72 2 (65 – 63) 9 (7 + 2)
 Grain material purity( For C grain taken CL & AH as a footing material than further fill up with BH.) S.No Particulars Values UOM Remarks 1 Solids in C Grain 52.8 MT 60 x 88 /100 2 Volume of the pan 41.8 M3 52.8 / 1.435 418 HL 41.8 x 10 3 Graing Volume 188.15 HL 418 x 45% 18.82 M3 188.15 / 10 4 Weight of the grain material 27 MT 18.82 x 1.435 5 Solids in grain material 23.22 MT 27 x 86 /100 6 Solids from AH for garin material 5.2 MT 23.22 x 2 / 9 7 Solids from CL for garin material 18.1 MT 23.22 – 5.2 8 Weight from AH for garin material 6.88 MT 5.2 x 100 / 75 9 Weight from CL for garin material 24.08 MT 18.1 x 100 / 75 10 Volume from AH for garin material 5.15 M3 6.88/1.337 51 HL 5.15 x 10 11 Volume from CL for garin material 18.01 M3 24.08 / 1.337 180 HL 18.01 x 10 12 Solids from BH to further filling of the grain material 29.58 MT 52.8 – 23.22 13 Weight from BH to further filling of the grain material 36.975 MT 29.58 x 80 /100 14 Volume from BH to further filling of the grain material 26.392 M3 36.975 / 1.401 264 HL 26.39 x 10 15 Final C grain drooping purity 59.2 [ (29.58 x 53) + (23.22 x 67)] / 52.8

Step 2 :

 C grain and BH molasses required for C Continuous pan for given grain and molasses ratio and  C massecuite final dropping Purity 1 Grain Quantity 60 MT 2 BH molasses quantity 180 MT 60 x 3 3 C grain solids for C m/c 52.80 MT 60 x 88/ 100 4 BH solids for C m/c 144 MT 180 x 80 /100 5 C m/c Production for given C grain Qty 196.80 T 52.80+144 Solids 196.80 T 196.80 x 100 /100 6 Grain feed Qty for Cont. Pan 6.10 MT/hr 60 x 20 /196.80 4.25 HL/hr 6.10 / 1.435 7 BH Molasses feed Qty for Cont. Pan 18.29 MT/hr 6.10 x 3 131 HL/hr 18.29 / 1.401 8 C m/c Final purity 54.65 %

Step 3 :

 Steam Flow requirement for Continuous pan 1 Evaporation rate in BH 20.00 % (100-80)/100 2 Evaporation rate in C grain 12.00 % (100-88)/100 4.39 T/hr [(6.10 x 12%) + (18.29 x 20%)] Consider 20% extra 5.27 T/hr 4.39 x 1.2 Steam Flow requirement for Cont. pan 5.27 T/hr

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## 5 thoughts on “C massecuite final purity calculation |Grain Quantity requirement for C CVP”

#### Dighe Annaso Tatya

(December 18, 2017 - 5:59 pm)

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#### siva alluri

(December 19, 2017 - 1:47 pm)

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(December 18, 2017 - 8:55 pm)

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#### siva alluri

(December 19, 2017 - 1:47 pm)

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